I think everyone knows how bizarre it is that this game exists at all. A cutesy RPG spinoff for FNAF, who could've possibly predicted that would happen? Even now I find it kind of crazy that this is a real game that Scott Cawthon really made.
Honestly, FNaF World's insane development cycle is far more interesting than the actual game itself. I'll keep it brief, but basically, FNaF World was released in such an unfinished state and received such negative reactions, that Scott refunded everyone who bought the game, and continued supporting it for free, fixing a lot of its issues and adding more content to it. With that in mind, I can definitely appreciate the game, and Scott wanting to try something fresh and different, but do I like the game? Honestly, no, not really.
I do not have it in me to go after all the trophies and endings, nor am I motivated to go after the Update 2 characters and its new ending (I know what all is there, don't worry). Since I only did a casual playthrough and got the normal ending, you could argue that I didn't play enough of the game to judge it's quality. At the same time though, I just don't want to keep playing it because it's not that fun. I WANT to like the game! I love the idea of a silly spinoff game embracing the absurdity of the FNAF IP and doing something different, but this game definitely needed more time in the oven. It's so barebones. There is barely a story here at all apart from some cryptic FNAF 4 callbacks and some stuff teasing Sister Location. The game relies on being meta and funny, but it didn't land for me personally. I do like the .exe games parody in Update 2 though. I'm aware of that, and that's actually funny, well done.
In terms of gameplay, even after all the patches and updates, it feels rough and unpolished. Battles are just visual noise, it's impossible to take in anything happening when a bunch of attacks are flying all over the screen at the same time, even covering the UI. It makes me wish the game was properly turn based instead of the cooldown system it actually has.
The overworld is confusing as hell to traverse and it's visually boring. At no point was I interested in exploring, I just wanted to get a move on. Also, there is literally no transition from the overworld to the random encounters whatsoever. There's not even an animation or a sound effect or anything. The game just goes from walking around the map, to the start of a battle in a single frame, and it is super jarring.
The character balance is whack. One thing I really do like is never knowing what characters you will get. You unlock new party members randomly so each playthrough can be a different experience. I like the idea on paper, but the problem is that some characters are just obviously better in every way. Once I unlocked a couple of the Nightmares and Funtime Foxy, the game was basically over, whereas before then, some encounters gave me some trouble. The game doesn't really encourage you to experiment with different party setups. Instead it just becomes, "Oh I'm just waiting for the actually good characters to show up so I can use those." If you're unlucky and end up with a lot of weak characters, then uh, I hope you like grinding!
That was a lot of complaining, I realize. I do want to stress that I do love FNaF World as a concept, and I had some fun with it here and there. The more I played though, the more I was noticing elements that annoyed me. I hope Scott takes another crack at making an RPG sometime, FNAF related or otherwise. He clearly has a passion for the genre, and again I think he deserves all the credit in the world for how he handled the release of this game. The man loves and respects his community and that's amazing to see.

Probably the most random offical FNaF game we have, excluding the smaller scale Freddy in Space entries or the occasional troll game released by Scott.

It was a game that was heavily criticized and shunned for being different. For not being scary or falling in line with what FNaF had been up until then. With those years behind us, we can appreciate FNaF World for what it is, a fun, FNaF character centered RPG that serves the purpose of complicating the narrative yet again and being a nice little fun game.